Mechanical hand



UNITED STATES WILHELM SCI-IIMMEL, 0F LEIPZIG-STOTTERITZ, GERMANY. i

MECHANICAL HAND.

Specication of Letters Patent Patented Mar. 14, 1922.

Application led May 3, 1921. Serial No. 466,526.

(GRANTED'UNDER THE PROVISIONS 0F TH ACT 0F MARCH 3, 1921, 41 STAT. L., 1313.) f

10 all whom t may concern:

Be it known that I, VILHnLu SCHIMMEL, of LeipZig-StotteritZ, Germany, a citizen of the German Republic, have invented certain new and useful Improvements in Mechanical Hands, (for which I have filed an application in Germany, June 6, 1919,) of which the following is a specification.

The object of this invention is to provide a mechanical hand which is adapted to play key instruments of any kind and can conveniently be used for advertising purposes, as by placing the same in a shop window together with a piano, which it plays.

The invention is illustrated in the anneXed drawing.

Fig. l is a sectional view with the hand closed.

F ig. 2 is a. full view tially closed fingers.

In the drawing, a designates part of the arm or wrist, Y) the hand, and c a frame or holder. The fingers f pivoted to the hand are in the form of bell cranks, whose arms of the hand with par- (Z are connected by wires a or equivalent means to levers g pivoted to the frame c. The levers g are held by springs Z in contact with cams m on a shaft a, which is driven by an electromotor, spring motor, or equivalent means, soy that the cams m actuate the levers g in turn and thus cause the lingers to strike the keys of the instrument over whose keyboard they are placed, the action being very similar to that ofva natural hand.

There may, of course, be twoY hands, joined to a figure seated on a chair. Means for moving the arms laterally may be provided, but are not included in this invention.

What I claim as my invention and desire to secure by Letters Patent of the United l. A mechanical hand for playing key in-V struments, comprising a support, fingers pivoted to said support, a shaft, a series of cams on said shaft, tuated by said cams, and wires severally connecting said levers to said fingers.

In witness whereof I have signed this specification in the presence of two witnesses.

WILHELMV SCHIMMEL. Witnesses LUIsn TsoHERNY, ARTHUR WERNER.

a series of levers severally ac- 

